光伏组件实例分析及等效加速老化测试研究.pdf

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1、老旧光伏组件实例分析及等效加速老化测试研究顺德中山大学太阳能研究院中山大学太阳能系统研究所董娴2014年8月5日ContentWhyandhowwedotheseworkAnalysisandreevaluationofagedmodulesCase1:1982Solarexmodule(poly-Si)Case2:1987BPmodule(mono-Si)Case3:1996Siemensmodule(mono-Si)DistributionofexperimentalsystemsOutlookWhyandhowwedotheseworkReliabilityandL

2、ife-cycleofmodulesarekeypointsforPVsystemsSchemeofqualityassessmentforPVmodulesResearch&AnalysisExperimentalPVsystemsDegradationmechanism&ModelAcceleratingtestsImprovementofacceleratingtestequipmentandsequenceStandardsforassessmentofmodulequalityAnalysisandreevaluationofagedmodulesExample1177pcs

3、ofmodulesfromHainanProvinceproducedbySolarexin1982Example250pcsofmodulesfromGuangdongProvinceproducedbyBPSolarin1987Example32000pcsofmodulesformGuangdongProvinceProducedbySiemensin1996Example1LocationofSolarexmodulesfrom1985-200818°23′~18°50′N,108°36′~109°05′E177polymodulesTropicmonsoonclimateEx

4、ample1Degradationof26-year-oldmulti-crystallineSimodulesPm/WIm/AVm/VIsc/AVoc/VFFRatedvalues42.62.8215.13.0220.80.68Actualvalues39.72.5015.92.820.30.7Relativeratio93.988.7105.292.197.5103.9(171modules,for6moduleswithrusty-brokenjunction-boxleadingtonoelectricaloutput)QuantityofmodulesPowerratioEx

5、ample1Statisticalanalysisofappearancedefectsfor177piecesof23-year-fieldmodulesAppearancedefectsRatio(%)RemarksAppearancecrack,bendingorbroken79.7includingbacksheetcrackBrokencells1.7-Cellcracks63.3possiblecrackorsnailtrailsJunctionboxrusty12.43.4%withoutoutputDelaminatedofEVA57.6bubblesinsideEVA

6、Cablefailures2.8nocableorwithoutouterplasticprotectDiodefailures2.8nodiodeYellow/brownappearance100encapsulationmaterialagingDirtordustonthesurfaceglass100partofthemcouldbecleanedExample1AppearancedefectsExample1AppearancedefectsExample1AnalysisofEVATransmittancecomparisonofsurfaceencapsulantC

7、rosslinkdegreeofEVAfromdifferentpartsinthemodule73.43%B94.86%AExample1AnalysisofbacksheetPulverizationandfractureofbacksheetExample1SafetytestofSolarexmodulesHailtest√Wetleakagecurrenttest√Insulationtest√Example1Per